/*!
 * Ext JS Library 3.3.0
 * Copyright(c) 2006-2010 Ext JS, Inc.
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
/** 
 * @class Ext.ux.grid.filter.NumericFilter
 * @extends Ext.ux.grid.filter.Filter
 * Filters using an Ext.ux.menu.RangeMenu.
 * <p><b><u>Example Usage:</u></b></p>
 * <pre><code>    
var filters = new Ext.ux.grid.GridFilters({
	...
	filters: [{
		type: 'numeric',
		dataIndex: 'price'
	}]
});
 * </code></pre> 
 */
Ext.ux.grid.filter.NumericFilter = Ext.extend(Ext.ux.grid.filter.Filter, {

	/**
	 * @cfg {Object} fieldCls
	 * The Class to use to construct each field item within this menu
	 * Defaults to:<pre>
	 * fieldCls : Ext.form.NumberField
	 * </pre>
	 */
	fieldCls : Ext.form.NumberField,
	/**
	 * @cfg {Object} fieldCfg
	 * The default configuration options for any field item unless superseded
	 * by the <code>{@link #fields}</code> configuration.
	 * Defaults to:<pre>
	 * fieldCfg : {}
	 * </pre>
	 * Example usage:
	 * <pre><code>
fieldCfg : {
	width: 150,
},
	 * </code></pre>
	 */
	/**
	 * @cfg {Object} fields
	 * The field items may be configured individually
	 * Defaults to <tt>undefined</tt>.
	 * Example usage:
	 * <pre><code>
fields : {
	gt: { // override fieldCfg options
		width: 200,
		fieldCls: Ext.ux.form.CustomNumberField // to override default {@link #fieldCls}
	}
},
	 * </code></pre>
	 */
	/**
	 * @cfg {Object} iconCls
	 * The iconCls to be applied to each comparator field item.
	 * Defaults to:<pre>
iconCls : {
	gt : 'ux-rangemenu-gt',
	lt : 'ux-rangemenu-lt',
	eq : 'ux-rangemenu-eq'
}
	 * </pre>
	 */
	iconCls : {
		gt : 'ux-rangemenu-gt',
		lt : 'ux-rangemenu-lt',
		eq : 'ux-rangemenu-eq'
	},

	/**
	 * @cfg {Object} menuItemCfgs
	 * Default configuration options for each menu item
	 * Defaults to:<pre>
menuItemCfgs : {
	emptyText: 'Enter Filter Text...',
	selectOnFocus: true,
	width: 125
}
	 * </pre>
	 */
	menuItemCfgs : {
		emptyText: 'Enter Filter Text...',
		selectOnFocus: true,
		width: 125
	},

	/**
	 * @cfg {Array} menuItems
	 * The items to be shown in this menu.  Items are added to the menu
	 * according to their position within this array. Defaults to:<pre>
	 * menuItems : ['lt','gt','-','eq']
	 * </pre>
	 */
	menuItems : ['lt', 'gt', '-', 'eq'],

	/**
	 * @private
	 * Template method that is to initialize the filter and install required menu items.
	 */
	init : function (config) {
		// if a menu already existed, do clean up first
		if (this.menu){
			this.menu.destroy();
		}
		this.menu = new Ext.ux.menu.RangeMenu(Ext.apply(config, {
			// pass along filter configs to the menu
			fieldCfg : this.fieldCfg || {},
			fieldCls : this.fieldCls,
			fields : this.fields || {},
			iconCls: this.iconCls,
			menuItemCfgs: this.menuItemCfgs,
			menuItems: this.menuItems,
			updateBuffer: this.updateBuffer
		}));
		// relay the event fired by the menu
		this.menu.on('update', this.fireUpdate, this);
	},

	/**
	 * @private
	 * Template method that is to get and return the value of the filter.
	 * @return {String} The value of this filter
	 */
	getValue : function () {
		return this.menu.getValue();
	},

	/**
	 * @private
	 * Template method that is to set the value of the filter.
	 * @param {Object} value The value to set the filter
	 */
	setValue : function (value) {
		this.menu.setValue(value);
	},

	/**
	 * @private
	 * Template method that is to return <tt>true</tt> if the filter
	 * has enough configuration information to be activated.
	 * @return {Boolean}
	 */
	isActivatable : function () {
		var values = this.getValue();
		for (key in values) {
			if (values[key] !== undefined) {
				return true;
			}
		}
		return false;
	},

	/**
	 * @private
	 * Template method that is to get and return serialized filter data for
	 * transmission to the server.
	 * @return {Object/Array} An object or collection of objects containing
	 * key value pairs representing the current configuration of the filter.
	 */
	getSerialArgs : function () {
		var key,
			args = [],
			values = this.menu.getValue();
		for (key in values) {
			args.push({
				type: 'numeric',
				comparison: key,
				value: values[key]
			});
		}
		return args;
	},

	/**
	 * Template method that is to validate the provided Ext.data.Record
	 * against the filters configuration.
	 * @param {Ext.data.Record} record The record to validate
	 * @return {Boolean} true if the record is valid within the bounds
	 * of the filter, false otherwise.
	 */
	validateRecord : function (record) {
		var val = record.get(this.dataIndex),
			values = this.getValue();
		if (values.eq !== undefined && val != values.eq) {
			return false;
		}
		if (values.lt !== undefined && val >= values.lt) {
			return false;
		}
		if (values.gt !== undefined && val <= values.gt) {
			return false;
		}
		return true;
	}
});